Lens, method for making same, and related lens module转让专利
申请号 : US12762377
文献号 : US07916410B1
文献日 : 2011-03-29
发明人 : Hou-Yao Lin , Sheng-Jung Yu
申请人 : Hou-Yao Lin , Sheng-Jung Yu
摘要 :
权利要求 :
What is claimed is:
说明书 :
1. Technical Field
The present disclosure relates to lenses and, particularly, to a lens, a method for making the lens, and a lens module having the lens. The lens has two precise coaxial optical surfaces.
2. Description of Related Art
Lenses are generally made by molding and include two opposite optical surfaces. To obtain high imaging quality, it is required that the two optical surfaces are strictly coaxial. However, it is difficult to machine a mold in which a lens made having two precise coaxial optical surfaces, limited to manufacturing precision.
Therefore, it is desirable to provide a lens, a method for making the lens, and a lens module having the lens, which can overcome the above-mentioned shortcomings.
Many aspects of the present embodiments should be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
The disclosure of the lens, method for making the lens, and lens module having the lens will now be described in detail with reference to the drawings.
Referring to
Also referring to
The sub-lens 200 includes an optical surface 202 and a flat combining surface 204 substantially opposite to the optical surface 202. The optical surface 202 is also predeterminedly curved for refracting light rays as desired and defines an optical axis 304. The optical surface 202 and the combining surface 204 defines an optical portion 207 of the sub-lens 200. The sub-lens 200 has a non-optical portion 208 surrounding the optical portion 207. The non-optical portion 208 has two opposite side surfaces 205 and 201. The side surface 205 is coplanar with the combing surface 204. The optical surface 202 are the bulged bottom surface of a recess 203, which is defined in the side surface 201, and is surrounded by the side surface 201 and connects to the side surface 201 via a slant side surface 206 of the recess 203. The side surface 205 has substantially the same shape and size of the combining surface 104.
To produce such the lens 10, the sub-lenses 100 and 200 first the lenses are made by molding. It is noteworthy that it is easier to machine molds for molding the sub-lenses 100 and 200, as compared to those for molding a lens having two opposite and strictly coaxial optical surfaces, since it is unnecessary to mold two strictly coaxial optical surfaces any more.
Then, curable glue 500 is applied to one of or both the combining surfaces 104 and 204. In this embodiment, the curable glue 500 is applied to the combining surface 104. The sub-lens 200 is placed in the recess 105 in a manner that the side surface 206 substantially coincides with and contacts the combining surface 104. The curable glue 500 is cured while positions of the sub-lenses 100 and 200 are adjusted to make the optical axes 302 and 304 coincide before the curable glue 500 is completely cured and with the assistance of a coaxial measurement monitor 50. The coaxial measurement monitor 50 can continuously measure and display the coaxial alignment of the lens 10 to provide basis for the adjustment of the sub-lenses 100 and 200. In practice, one of the sub-lenses 100 and 200 can be fixed in place, while the other is adjusted to archive the precise coaxial alignment of the lens 10. In this embodiment, the sub-lens 100 is immovably fixed and the sub-lens 200 is adjusted.
It is noteworthy that the orthogonal projection of the slant surface on the bottom surface of the recess 105 is outside the combining surface 104. As such, the sub-lens 200 can be fittingly located by the recess 105 by the alignment between the combining surface 104 and the combining surface 204. In the illustrated embodiment, the recess 105 is but should not limited to a conic recess.
Referring to
It will be understood that the above particular embodiments and methods are shown and described by way of illustration only. The principles and the features of the present disclosure may be employed in various and numerous embodiment thereof without departing from the scope of the disclosure as claimed. The above-described embodiments illustrate the scope of the disclosure but do not restrict the scope of the disclosure.